In De trinitate X Augustine seeks to discover the nature of mind (mens). As if recalling Plato’s Paradox of Inquiry, he wonders how such a search can be coherently understood. Rejecting the idea that the mind knows itself only indirectly, or partially, or by description, he insists that nothing is so present to the mind as itself. Yet it is open to the mind to perfect its knowledge of itself by coming to realize that its nature is to be only what it is certain that it is